DE4107285A1 - Composite panel for floor of caravan - has core of rigid plastics, with covering bonded to each side - Google Patents

Composite panel for floor of caravan - has core of rigid plastics, with covering bonded to each side

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Publication number
DE4107285A1
DE4107285A1 DE4107285A DE4107285A DE4107285A1 DE 4107285 A1 DE4107285 A1 DE 4107285A1 DE 4107285 A DE4107285 A DE 4107285A DE 4107285 A DE4107285 A DE 4107285A DE 4107285 A1 DE4107285 A1 DE 4107285A1
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Germany
Prior art keywords
composite panel
depressions
panel according
core
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE4107285A
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German (de)
Inventor
Gerhard Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dethleffs GmbH and Co KG
Original Assignee
Dethleffs GmbH and Co KG
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Filing date
Publication date
Application filed by Dethleffs GmbH and Co KG filed Critical Dethleffs GmbH and Co KG
Priority to DE4107285A priority Critical patent/DE4107285A1/en
Publication of DE4107285A1 publication Critical patent/DE4107285A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
    • B60P3/32—Vehicles adapted to transport, to carry or to comprise special loads or objects comprising living accommodation for people, e.g. caravans, camping, or like vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
    • E04C2/243—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20 one at least of the material being insulating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/296—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and non-metallic or unspecified sheet-material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—Foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)

Abstract

A composite panel consists of a core of rigid plastic foam (3) with a covering layer (1) bonded to each side. Small depressions are formed in the surface on both sides of the core. These depressions may be of cylindrical form (4) or they may be of semicircular cross-section (5) and are arranged in a regular pattern which extends over the entire surface of each side of the core. These depressions receive the adhesive which bonds the covering layers to the core. The use of small depressions avoids the risk of stress concentration which occurs along the edges of continuous grooves. USE/ADVANTAGE - Panels are used to form the floors of caravans and possess high bending strength combined with low weight.

Description

Die Erfindung betrifft eine Verbundplatte aus einer Kernschicht aus Hartschaum und zwei mit dieser verklebten Deckschichten, insbesondere für Anwendungen, die eine Biegebeanspruchung mit sich bringen.The invention relates to a composite panel from a Core layer made of hard foam and two glued to it Cover layers, especially for applications that require a Bring bending stress.

Im Wohnwagenbau ist es bekannt und üblich, den Boden des Wagenaufbaues als Verbundplatte auszubilden, deren Deckschichten aus Sperrholz bestehen und deren Kernschicht zusammengesetzt ist aus quer zu den Tragholmen des Fahrgestells verlaufenden Holzleisten und dazwischen gelegten Styroporplatten-Streifen gleicher Dicke. Man erreicht dadurch ein verhältnismäßig günstiges Festigkeits-Gewichts-Verhältnis und vor allem eine hohe Festigkeit gegen die auftretenden dynamischen Beanspruchungen.In caravan construction, it is known and common to use the floor of the Train car body as a composite panel, the Cover layers consist of plywood and their core layer is composed of transverse to the spars of the Chassis wooden strips and placed in between Styrofoam strips of the same thickness. You get through it a relatively favorable strength-to-weight ratio and above all a high strength against the occurring dynamic loads.

Andererseits ist der Arbeitsaufwand zum Auslegen der Latten und Styroporstreifen beträchtlich, so daß sich ein Bedürfnis entwickelt hat, reine Hartschaum-Verbundplatten als Bodenplatten einzusetzen. Dabei steht die Biegefestigkeit im Vordergrund. Es ist bereits bekannt, zur Erhöhung der Biegefestigkeit die Oberflächen des Kernschichtwerkstoffs mit querschnittlich rechteckigen Rillen zu versehen, die in gleichem Abstand parallel zueinander über die ganze Länge der betreffenden Platte verlaufen. Eine solche Rillung kann den Verklebungsprozeß unterstützen, indem sie den Luftaustritt fördert und die mechanische Verklammerung des Klebers in die Schaumstoffoberfläche verbessert. Der sich in den Rillen konzentrierende Klebstoff bildet fest mit den Deckschichten verbundene Wülste oder Dämme, an denen sich die mit der Deckschicht verklebte Oberfläche des Kernschichtwerkstoffs zusätzlich abstützt, wenn die Klebeverbindung bei starker Biegebeanspruchung entsprechenden Verschiebekräften unterworfen ist.On the other hand, the work involved in laying out the slats and styrofoam strips considerably, so there is a need has developed pure rigid foam composite panels as Use floor slabs. The bending strength is in the  Foreground. It is already known to increase the Bending strength with the surfaces of the core layer material cross-sectional rectangular grooves to be provided in same distance parallel to each other over the entire length of the concerned plate run. Such scoring can Support the gluing process by preventing air leakage promotes and the mechanical clamping of the adhesive in the Foam surface improved. The one in the grooves Concentrating adhesive forms firmly with the cover layers connected ridges or dams on which the with the Surface layer glued surface of the core layer material additionally supports if the adhesive connection is strong Bending load corresponding displacement forces is subject.

Bei Biegebelastungsprüfungen bis zum Bruch nach dem Schema Balken auf zwei Stützen und Mittelbelastung hat sich jedoch gezeigt, daß wenn die Rillen senkrecht zur Abstandslinie der Auflager verlaufen eine Kerbwirkung infolge der Rillen zu beobachten ist. Das macht nicht nur den Effekt der verbesserten Haftung zwischen Deckschicht und Kernschicht zunichte, sondern kann sogar zu einer Verschlechterung der Biegefestigkeit führen.For bending load tests up to break according to the scheme However, beams on two supports and medium load shown that when the grooves are perpendicular to the distance line of the Bearings have a notch effect due to the grooves watch is. That doesn't just make the effect of improved adhesion between top layer and core layer nullify, but may even worsen Flexural strength.

Der Erfindung liegt die Aufgabe zugrunde, eine zu vernünftigem Preis herstellbare Verbundplatte der einleitend bezeichneten Art anzugeben, die bei vergleichbarer Gesamtdicke und vergleichbaren Deckschichten eine Biegefestigkeit mindestens in der Größenordnung üblicher Wohnwagen-Bodenplatten hat.The invention is based on the object reasonably priced composite plate of the introductory Specify the specified type, the comparable Total thickness and comparable cover layers one Bending strength at least in the order of magnitude more common Has caravan floor panels.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Oberflächen des Kernschichtwerkstoffs mit vereinzelten örtlich begrenzten Vertiefungen versehen sind. Dadurch entsteht einerseits ein beträchtlicher Abstützeffekt des Kernschichtwerkstoffs gegenüber den Deckschichten in allen Verschieberichtungen und andererseits entfällt die Kerbwirkung der bekannten Rillen. Das führt zu einer erstaunlichen Steigerung der Biegefestigkeit, so daß die Biegefestigkeit von Verbundplatten mit eingeschlossenen Holzleisten erreicht oder sogar überschritten wird.This object is achieved in that the Surfaces of the core layer material with isolated local depressions are provided. Thereby on the one hand, there is a considerable support effect of the  Core layer material compared to the cover layers in all Sliding directions and on the other hand the Notch effect of the known grooves. That leads to one amazing increase in flexural strength so that the Flexural strength of composite panels with included Wooden slats are reached or even exceeded.

Die Vertiefungen können auf irgendeine sinnvolle Weise eingebracht werden, z. B. durch Bohren, Fräsen, Sägen, Einreißen oder auch durch Einformen. Bekanntlich werden Schaumstoffe zwischen stationären oder wandernden parallelen Formplatten aufgeschäumt. Diese Formplatten könnten entsprechende Erhebungen oder Vorsprünge aufweisen, die sich dann in der Schaumstoffoberfläche als Vertiefungen abbilden.The recesses can be made in any meaningful way be introduced, e.g. B. by drilling, milling, sawing, Tear or by molding. Be known Foams between stationary or moving parallel ones Foamed sheets. These mold plates could have corresponding elevations or protrusions then map as depressions in the foam surface.

Vorzugsweise haben die Vertiefungen eine zylindrische Form, wobei insbesondere die Tiefe und der Durchmesser annähernd übereinstimmen. Diese Vertiefungen können in einem Rechteck-, insbesondere einem Quadratraster angeordnet sein. Dabei wird man je nach der Art der Biegebelastung der betreffenden Platte das Rechteckraster vorzugsweise schräg zu den Kanten einer z. B. rechtwinkligen Platte legen.The depressions preferably have a cylindrical shape, in particular the depth and the diameter approximately to match. These recesses can be in a rectangular, in particular be arranged in a square grid. Doing so one depending on the type of bending load of the concerned Plate the rectangular grid preferably at an angle to the edges a z. B. Place rectangular plate.

Mit derartigen Oberflächenvertiefungen wurden bei Verbundplatten mit Sperrholz-Deckschichten und einer Kernschicht aus extrudiertem Polystyrol Vergleichsmessungen durchgeführt. Die Bruchbelastung bei einer Verbundplatte mit ebenen Kernschicht-Oberflächen wurde mit 100% angesetzt. Bei gerillten Oberflächen ergaben sich dann Bruchbelastungen zwischen 73% und 122%, je nach der Orientierung der Rillen zur Biegelinie. Gebohrte Oberflächenvertiefungen im Quadratraster bei ansonsten gleichartigen Verbundplatten erbrachten eine Bruchfestigkeit von 195%.With such surface depressions Composite panels with plywood top layers and one Extruded polystyrene core layer Comparative measurements carried out. The breaking load on a composite panel with flat core layer surfaces were set at 100%. At grooved surfaces then resulted in breaking loads between 73% and 122%, depending on the orientation of the grooves to the bending line. Drilled surface depressions in the Square grid for otherwise identical composite panels gave a breaking strength of 195%.

Andere vorteilhafte Oberflächenvertiefungen sind möglich. So können die Vertiefungen beispielsweise mit unterschiedlicher Orientierung angeordnete Nutstücke sein. Geeignete kurze nutartige Vertiefungen können z. B. durch Eintauchen eines Stirnradfräsers oder einer kleinen Kreissäge entstehen. Durch Eintauchen eines Topffräsers, der um eine Querachse geschwenkt wird, entstehen ebenfalls geeignete Bogennuten, die in der Mitte am tiefsten sind und zu den Enden hin auslaufen. Die Vertiefungen können auch mit Hohlmessern, beispielsweise durch eine mit solchen Messern bestückte Walze, oder durch Schneidwerkzeuge in Form einer großen Raspel hergestellt werden. Schließlich besteht die Möglichkeit, Vertiefungen mit rauher Innenfläche durch Herausreißen kleiner Oberflächenstücke mit Hilfe eines Klemmwerkzeuges zu erzeugen.Other advantageous surface depressions are possible. So can, for example, the recesses with different  Orientation arranged pieces of groove. Suitable short groove-like depressions can, for. B. by immersing one Spur gear cutter or a small circular saw. By Immersion of a pot mill around a transverse axis suitable arc grooves are also created, which are deepest in the middle and towards the ends leak. The recesses can also be made with hollow knives, for example, one equipped with such knives Roller, or by cutting tools in the form of a large Rasp are made. Finally, there is Possibility of recesses with a rough inner surface Tear out small pieces of surface with the help of a To generate clamping tool.

Ausführungsbeispiele der Erfindung werden nachfolgend schematisch zeichnerisch dargestellt.Embodiments of the invention are as follows represented schematically.

Fig. 1 zeigt eine Verbundplatte im Querschnitt. Die Deckschichten sind mit 1 und 2 und die Kernschicht ist mit 3 bezeichnet. In den Oberflächen der Kernschicht befinden sich zylindrische Vertiefungen 4. Fig. 1 shows a composite panel in cross section. The cover layers are labeled 1 and 2 and the core layer is labeled 3 . There are cylindrical depressions 4 in the surfaces of the core layer.

Fig. 2 zeigt in der Draufsicht einen Teil des Kernschichtwerkstoffs 3 ohne die Deckschicht. Die zylindrischen Vertiefungen 4 sind in einem schräg zu den Kanten der Platte verlaufenden Quadratraster mit einem Lochabstand von z. B. 25 mm angeordnet. Fig. 2 shows in plan view a part of the core layer material 3 without the covering layer. The cylindrical recesses 4 are in an oblique to the edges of the plate square grid with a hole spacing of z. B. 25 mm arranged.

Fig. 3 zeigt diese zylindrische Vertiefung 4, die einen Durchmesser und eine Tiefe von je 5 mm hat, in größerem Maßstab. Fig. 3 shows this cylindrical recess 4 , which has a diameter and a depth of 5 mm, on a larger scale.

Fig. 4 zeigt eine mögliche Anordnung von Oberflächenvertiefungen in Gestalt kurzer geradliniger Nutenstücke 5, wie sie z. B. in den Fig. 5 und 6 in größerem Maßstab im Schnitt und in der Draufsicht dargestellt sind. Fig. 4 shows a possible arrangement of surface depressions in the form of short straight groove pieces 5 , as z. B. in Figs. 5 and 6 are shown on a larger scale in section and in plan view.

Fig. 7 zeigt einen Axialschnitt eines Topffräsers 6, der durch Querneigung Bogennuten 7 erzeugt, wie eine in Fig. 8 in der Draufsicht dargestellt ist. FIG. 7 shows an axial section of a pot milling cutter 6 , which produces transverse grooves 7 by transverse inclination, as is shown in plan view in FIG. 8.

Die Fig. 9 und 10 zeigen ebenfalls im Schnitt und in der Draufsicht eine durch Herausreißen eines Schaumstoffstückchens entstandene Vertiefung 8 mit rauher Innenoberfläche. FIGS. 9 and 10 show also in section and in plan view a deterioration caused by a tearing Schaumstoffstückchens recess 8 having a rough inner surface.

Claims (11)

1. Verbundplatte aus einer Kernschicht aus Hartschaum und zwei mit dieser verklebten Deckschichten, insbesondere für Anwendungen, die eine Biegebeanspruchung mit sich bringen, dadurch gekennzeichnet, daß die Oberflächen des Kernschichtwerkstoffs (3) mit vereinzelten örtlich begrenzten Vertiefungen (4, 5, 7, 8) versehen sind.1. Composite plate made of a core layer made of hard foam and two cover layers glued to it, in particular for applications which involve bending stress, characterized in that the surfaces of the core layer material ( 3 ) with isolated, locally delimited depressions ( 4 , 5 , 7 , 8 ) are provided. 2. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen (4) von zylindrischer Form sind.2. Composite panel according to claim 1, characterized in that the recesses ( 4 ) are cylindrical in shape. 3. Verbundplatte nach Anspruch 2, dadurch gekennzeichnet, daß die Tiefe und der Durchmesser der Vertiefungen (4) annähernd übereinstimmen.3. Composite panel according to claim 2, characterized in that the depth and the diameter of the recesses ( 4 ) approximately match. 4. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen (4, 5, 7, 8) in einem Rechteck-, insbesondere einem Quadratraster angeordnet sind.4. Composite panel according to claim 1, characterized in that the depressions ( 4 , 5 , 7 , 8 ) are arranged in a rectangular, in particular a square grid. 5. Verbundplatte mit rechteckigem Zuschnitt, dadurch gekennzeichnet, daß das Rechteckraster schräg zu den Kanten gelegt ist.5. Composite panel with a rectangular blank, thereby characterized in that the rectangular grid obliquely to the edges is laid. 6. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen mit unterschiedlicher Orientierung angeordnete Nutstücke (7) sind. 6. Composite panel according to claim 1, characterized in that the depressions are arranged with different orientation groove pieces ( 7 ). 7. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen eingebohrt, eingefräst oder eingesägt sind.7. Composite panel according to claim 1, characterized in that the wells are drilled, milled or sawn are. 8. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen mit Hohlmessern oder ähnlichen Werkzeugen angebracht sind.8. Composite panel according to claim 1, characterized in that the recesses with hollow knives or the like Tools are attached. 9. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen (8) durch Herausreißen kleiner Stücke mit Hilfe von Klemmwerkzeugen erzeugt sind.9. Composite panel according to claim 1, characterized in that the depressions ( 8 ) are produced by tearing out small pieces with the aid of clamping tools. 10. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen mittels eines um eine Querachse schwenkbaren Topffräsers (6) eingebrachte Bogennuten (7) sind.10. The composite panel according to claim 1, characterized in that the recesses by means of a pivotable about a transverse axis pot mill (6) introduced arc grooves (7). 11. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen in den aufschäumenden Werkstoff durch eine positive Form eingeformt sind.11. Composite panel according to claim 1, characterized characterized in that the depressions in the foaming Are molded in by a positive shape.
DE4107285A 1991-03-07 1991-03-07 Composite panel for floor of caravan - has core of rigid plastics, with covering bonded to each side Withdrawn DE4107285A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4107285A DE4107285A1 (en) 1991-03-07 1991-03-07 Composite panel for floor of caravan - has core of rigid plastics, with covering bonded to each side

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4107285A DE4107285A1 (en) 1991-03-07 1991-03-07 Composite panel for floor of caravan - has core of rigid plastics, with covering bonded to each side

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DE4107285A1 true DE4107285A1 (en) 1992-09-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509972A1 (en) * 1995-03-18 1996-09-19 Krauss Maffei Verkehrstechnik Sandwich panels
DE10250665A1 (en) * 2002-09-10 2004-03-25 Weinmann Holzbausystemtechnik Gmbh wall system
DE10308377A1 (en) * 2003-02-27 2004-10-28 IsoBouw Dämmtechnik GmbH Wall or roof element

Citations (9)

* Cited by examiner, † Cited by third party
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DE1903956U (en) * 1962-01-18 1964-11-05 Ronald-Hasso Langhoff PACKAGING ELEMENT.
DE2424001A1 (en) * 1974-05-17 1975-11-20 Daimler Benz Ag Welded trim panels for vehicle interior - having gaps between panels and seamless joints of top and bottom covers welded together in gaps
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